package top.aias.asr.vad;

import java.util.Collection;
import java.util.Iterator;
import java.util.LinkedList;
import java.util.Queue;

/**
 * 固定长度队列
 * Fixed-length queue
 */
public class FixedQueue<E> implements Queue<E> {
  // 队列长度
  // Length of the queue
  private int size;

  Queue<E> queue = new LinkedList<E>();

  public FixedQueue(int size) {
    this.size = size;
  }

  /**
   * 入队
   * Enqueue
   *
   * @param e
   */
  @Override
  public boolean offer(E e) {
    if (queue.size() >= size) {
      // 如果超出长度,入队时,先出队
      queue.poll();
    }
    return queue.offer(e);
  }

  /**
   * 出队
   * Dequeue
   *
   * @return
   */
  @Override
  public E poll() {
    return queue.poll();
  }

  /**
   * 获取队列
   * Get queue
   *
   * @return
   */
  public Queue<E> getQueue() {
    return queue;
  }

  /**
   * 获取限制大小
   * Get limit size
   *
   * @return
   */
  public int getSize() {
    return size;
  }

  @Override
  public boolean add(E e) {
    return queue.add(e);
  }

  @Override
  public E element() {
    return queue.element();
  }

  @Override
  public E peek() {
    return queue.peek();
  }

  @Override
  public boolean isEmpty() {
    return queue.size() == 0 ? true : false;
  }

  @Override
  public int size() {
    return queue.size();
  }

  @Override
  public E remove() {
    return queue.remove();
  }

  @Override
  public boolean addAll(Collection<? extends E> c) {
    return queue.addAll(c);
  }

  @Override
  public void clear() {
    queue.clear();
  }

  @Override
  public boolean contains(Object o) {
    return queue.contains(o);
  }

  @Override
  public boolean containsAll(Collection<?> c) {
    return queue.containsAll(c);
  }

  @Override
  public Iterator<E> iterator() {
    return queue.iterator();
  }

  @Override
  public boolean remove(Object o) {
    return queue.remove(o);
  }

  @Override
  public boolean removeAll(Collection<?> c) {
    return queue.removeAll(c);
  }

  @Override
  public boolean retainAll(Collection<?> c) {
    return queue.retainAll(c);
  }

  @Override
  public Object[] toArray() {
    return queue.toArray();
  }

  @Override
  public <T> T[] toArray(T[] a) {
    return queue.toArray(a);
  }
}
